86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
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/*
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* crypt_buf_gen.c -- tool to re-create the static decryption buffer.
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*
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* Copyright (c) 2003-2008 Maik Broemme <mbroemme@plusserver.de>
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* Copyright (c) 2008 Georg Lukas <georg@op-co.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*
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* Usage:
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* $ make crypt_buf_gen
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* $ ./crypt_buf_gen > crypt_buf.h
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*
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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static uint32_t *buffer;
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int32_t libmpq__buffer_init() {
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buffer = malloc(sizeof(uint32_t) * 0x500);
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if (!buffer)
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return -1;
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/* some common variables. */
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uint32_t seed = 0x00100001;
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uint32_t index1 = 0;
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uint32_t index2 = 0;
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uint32_t i;
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/* initialize the decryption buffer. */
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for (index1 = 0; index1 < 0x100; index1++) {
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for(index2 = index1, i = 0; i < 5; i++, index2 += 0x100) {
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/* some common variables. */
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uint32_t temp1, temp2;
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/* temporary copy. */
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seed = (seed * 125 + 3) % 0x2AAAAB;
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temp1 = (seed & 0xFFFF) << 0x10;
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/* temporary copy. */
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seed = (seed * 125 + 3) % 0x2AAAAB;
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temp2 = (seed & 0xFFFF);
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/* assign buffer. */
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buffer[index2] = (temp1 | temp2);
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}
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}
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/* if no error was found, return zero. */
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return 0;
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}
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int main() {
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if (libmpq__buffer_init() != 0)
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perror("libmpq__buffer_init()");
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int x;
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printf("/* DO NOT CHANGE! this file is auto-generated by crypt_buf_gen.c */\n");
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printf("static const uint32_t crypt_buf[0x500] = {\n\t");
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for (x = 0; x < 0x500; x++) {
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printf("0x%08x", buffer[x]);
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if (x < 0x500 - 1) {
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if (x % 6 == 5)
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printf(",\n\t");
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else
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printf(", ");
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}
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}
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printf("\n};\n");
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}
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